[llvm-branch-commits] [SPARC][IAS] Rework ASI tag matching in prep for `ParseForAllFeatures` (PR #96020)

[via llvm-branch-commits]

https://github.com/koachan created https://github.com/llvm/llvm-project/pull/96020

This changes the ASI tag matching at `parseASITag` to use a similar
implementation to `parsePrefetchTag`. This introduces a slight regression
to error messages, but is needed so we can enable `ParseForAllFeatures`
in `MatchOperandParserImpl` in a future patch.